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The document describes the human circulatory system, including the heart and blood vessels. It discusses the structure of the heart and how blood flows through the different chambers. It also explains the differences between arteries, capillaries, and veins in terms of their location, thickness, lumen size, presence of valves, blood flow speed, and blood pressure. Finally, it provides a role play activity to demonstrate how blood circulates through the heart and picks up and releases oxygen.
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- 1. The Human Circulatory System
- 2. The heart
- 3. 2D - The heart
- 5. wires/tubes(different size)-fill with sponge and paper. Sponge B A C Paper
- 7. The connection of blood vessels
- 9. Differences between blood vessels characteristics artery cappilary Vein location Located between Between arteriole Between heart and blood and venule cappilary and cappilary heart Thickness of Thick wall Thin wall, only Thin wall & less muscular wall one cell thick muscular lumen Has small lumen Very small lumen Big lumen valve No valve No valve Has valve function Carries blood Carries blood Carries blood away from the from arteries to towards the heart heart venule Blood flow Rapid blood flow Slow blood flow Slow blood flow Blood pressure high low Very low
- 10. ROLE PLAY How the blood circulates through the heart 1.Set up a heart using students as the walls, atriums, ventricles, and valves. 2.Students should hold hands, or touch hands- except the people representing the valves-they will open and close as the "Blood" people pass through. 3.Select two students to be the "blood". 4.Set up a chair on each side of the "heart" to represent the lungs 5.Place a red object or paper at each lung-this represents an oxygen molecule that is picked up by the "blood". 6.The "blood" will travel through the atriums to the ventricles 7.The atrium students gently "squeeze" the blood people through the valves- which will open and close their outstretched arms. 8.Show oxygenation of the blood by picking up the red object at the lungs, traveling through the heart, and picking up the blue object to show deoxygenation and use of oxygen by the body. 9.Several runs-students will want a chance to be the "blood"! . Have fun!
- 11. Path of blood flow in the circulatory system Head and neck Artery Hands Pulmonary Pulmonary Lungs vein artery Heart Vena Aorta Vein cava Heart Liver Stomach and intestine Kidneys Deoxygenated blood Legs Oxygenated blood